EFFINGHAM, a city of Illinois, U.S.A., midway between Terre Haute and Saint Louis, on Federal highways 4o and 45, and near the Little Wabash river; the county seat of Effingham county. It is served by the Illinois Central, the Pennsylvania and the Wabash railways. The population was 4,024 in 1920; in 1930 it was 4,978. It is the commercial centre of a rich farming and dairying region. Its principal manufactures are condensed milk, ketchup, canned vegetables and butchers' blocks. The city was settled about 1853 and incorporated in 1867.